Need help with custom loop

I am new to wordpress, if anyone could help me it would be hugely appreciated. Here is my problem:

I have query posts on a Page which gets 5 posts per page. Currently it gets 2 posts and displays there content, then gets 3 posts offset by 2 and displays the excerpt only. So 2 big posts and 3 small. When I go to the older posts Page 2 the page displays the same layout as the first. What I would like to happen is that any older posts only display the excerpts, so when you are on page 2 -> 5 posts are displayed using the excerpt only. Using pagination.

Here is my site: https://www.thinkluke.com/blog/

Anyhelp would be appreciated.